SIMBAD references

We present the results of a survey for Lyα emitters at z~5.7 based on optical narrowband (λ_c=8150 Å and Δλ=120 Å) and broadband (B, R_C, I_C, and z') observations of the field surrounding the high-redshift quasar SDSSp J104433.04-012522.2 with the 8.2 m Subaru Telescope using the Subaru prime-focus camera, Suprime-Cam. This survey covers a sky area of ~720 arcmin² and a comoving volume of ≃2x10⁵ h^–3_0.7Mpc³. We have found 20 candidate Lyα emitters at z~5.7 with Δz~0.1. Two of them have been confirmed as star-forming galaxies at z=5.655 and z=5.687 from our follow-up optical spectroscopy. We discuss the star formation properties of the 20 objects from a statistical point of view. Our survey leads to a new estimate of the star formation rate density at z~5.7, ∼1.2x10^–3 h_0.7M_☉yr^–1 Mpc^–3.